MIDA-449 Defeated by the Unintentional Nipple Erections of a Student in a Soaked School Swimsuit... As Her Homeroom Teacher, My Rationality Collapses, and I Indulge in One-on-One Taboo Sex Training After School - Izumi Momoka

The male protagonist, a homeroom teacher, is utterly defeated by the unwitting temptation of his student Izumi Momoka's protruding nipples visible through her soaked school swimsuit. His rationality crumbles as he indulges in forbidden one-on-one sexual training sessions after school, where the two engage in a series of seductive and passionate secret interactions—from teasing under the swimsuit to complete carnal fusion—exploring the taboo boundaries of desire between teacher and student.